(function ($) {
    $.fn.innerfade = function (options) {
        return this.each(function () {
            $.innerfade(this, options)
        })
    };
    $.innerfade = function (container, options) {
        var settings = {
            'animationtype': 'fade',
            'speed': 'normal',
            'type': 'sequence',
            'timeout': 2000,
            'containerheight': 'auto',
            'runningclass': 'innerfade',
            'children': null
        };
        if (options) $.extend(settings, options);
        if (settings.children === null) var elements = $(container).children();
        else var elements = $(container).children(settings.children); if (elements.length > 1) {
            $(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute').hide()
            };
            if (settings.type == "sequence") {
                setTimeout(function () {
                    $.innerfade.next(elements, settings, 1, 0)
                }, settings.timeout);
                $(elements[0]).show()
            } else if (settings.type == "random") {
                var last = Math.floor(Math.random() * (elements.length));
                setTimeout(function () {
                    do {
                        current = Math.floor(Math.random() * (elements.length))
                    } while (last == current);
                    $.innerfade.next(elements, settings, current, last)
                }, settings.timeout);
                $(elements[last]).show()
            } else if (settings.type == 'random_start') {
                settings.type = 'sequence';
                var current = Math.floor(Math.random() * (elements.length));
                setTimeout(function () {
                    $.innerfade.next(elements, settings, (current + 1) % elements.length, current)
                }, settings.timeout);
                $(elements[current]).show()
            } else {
                alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'')
            }
        }
    };
    $.innerfade.next = function (elements, settings, current, last) {
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed)
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed, function () {
                removeFilter($(this)[0])
            })
        } else alert('Innerfade-animationtype must either be \'slide\' or \'fade\''); if (settings.type == "sequence") {
            if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1
            } else {
                current = 0;
                last = elements.length - 1
            }
        } else if (settings.type == "random") {
            last = current;
            while (current == last) current = Math.floor(Math.random() * elements.length)
        } else alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
        setTimeout((function () {
            $.innerfade.next(elements, settings, current, last)
        }), settings.timeout)
    }
})(jQuery);

function removeFilter(element) {
    if (element.style.removeAttribute) {
        element.style.removeAttribute('filter')
    }
}